Variable speed transmission and elastic belt clamping force control device

(19)

(11)

EP 1 099 885 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	03.12.2003 Bulletin 2003/49

(43)	Date of publication A2:
	16.05.2001 Bulletin 2001/20

(21)	Application number: 00124597.6

(22)	Date of filing: 10.11.2000

(51)	International Patent Classification (IPC)⁷: F16H 61/00

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

13.11.1999 JP 35966999

(71)	Applicant: Tokyo Automatic Machinery Co., Ltd.
	Tokyo (JP)

(72)	Inventor:
	Onogi, Kenkichi, Tokyo Automatic Machinery Co.,Ltd Tokyo (JP)

(74)	Representative: Eisenführ, Speiser & Partner
	Patentanwälte Rechtsanwälte Postfach 10 60 78 28060 Bremen 28060 Bremen (DE)

(54)	Variable speed transmission and elastic belt clamping force control device

(57) A continuously variable "V" best transmission comprises a device (5) for applying an elastic axial force to the belt (11). The axial force is generated by compressing an elastic member (33) arranged in series with a compression device (4). The transmission further comprises a friction force and rotational speed detector, an operating device for suitably generating the axial force, and a control device for calculating a deviation between a selected valve and a detected value of the predetermined axial force and compensating the error.

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